CN205632134U - Electric automobile charge protection circuit - Google Patents
Electric automobile charge protection circuit Download PDFInfo
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- CN205632134U CN205632134U CN201620316142.3U CN201620316142U CN205632134U CN 205632134 U CN205632134 U CN 205632134U CN 201620316142 U CN201620316142 U CN 201620316142U CN 205632134 U CN205632134 U CN 205632134U
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- 238000000034 method Methods 0.000 abstract description 5
- 238000004891 communication Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to an electric automobile charge protection circuit, it includes the battery charging outfit, power battery, battery management unit, the high pressure consumer, the battery, the electricity box is divided to low pressure, low voltage electrical equipment, high pressure main relay, the relay charges, the low voltage electrical equipment that need to last the power supply passes through low pressure and lasts the power supply line and connect in that the electricity box is divided to low pressure on one of them divides potential relay, be connected with first relay and second relay on the the low voltage power supply output port of battery charging outfit, the normally closed contact series of first relay is on low pressure lasts the power supply line, the normally opened contact series of first relay lasts between the low voltage electrical equipment of power supply at the the low voltage power supply output port and the need of battery charging outfit, the normally closed contact series of second relay is in high -pressure main relay's coil power return circuit. The utility model discloses the normal power consumption of vehicle in can guaranteeing to fill electrical safety nature and not influencing the charging process, circuit structure is simple, operation safe and reliable.
Description
Technical field
This utility model relates to electric automobile safety utilization of electric power field, a kind of charging electric vehicle protection circuit.
Background technology
In the electricity system of electric automobile, electrokinetic cell provides electric power to the high pressure electrical equipment such as motor, air conditioning for automobiles, Vehicular accumulator cell provides electric power to low voltage equipments such as instrument, high pressure main relay it is in series with between electrokinetic cell and high voltage electric equipment, the coil of high pressure main relay controls end and is controlled by battery management unit BMS, accumulator distributes electric power to each low voltage equipment by distributor case, arranges multiple low pressure and divide electrical relay in distributor case.When carrying out Vehicular charging, the charger such as charging pile or Vehicular charger is utilized to connect external power source, and connect the charging circuit of electrokinetic cell, it is in series with charge relay on the charging circuit of electrokinetic cell, the coil of charge relay controls end and is also controlled by battery management unit BMS, after battery management unit BMS receives the connection confirmation signal of charging pile or Vehicular charger, control to open charge relay to power battery charging.Wherein, for the charger such as charging pile or Vehicular charger, civil power or commercial power are converted into direct current by it, then the electrokinetic cell of electric automobile is charged, it is in addition to having high voltage power supply output port, being usually constructed with low-tension supply output port, the charged state of low-voltage power supply and instrument to ensure battery management module shows.
In carrying out practically, if started up the car in the case of being not turned off charger, or in the case of being not turned off high voltage component, being switched on external power source charging, the most easily causing potential safety hazard, affecting the properly functioning of mobile unit.
In order to solve the problems referred to above; the application for a patent for invention having one entitled " Control of Electric Vehicles and charge protection device ", number of patent application to be " 201610097655.0 " in prior art discloses a kind of protection circuit; this protection circuit connects charge protection relay on charging circuit; the normally-closed contact of this charge protection relay is connected on vehicle circuitry; thus ensure when charging; vehicle-mounted electrical equipment cannot work, to ensure charging safety.But; the program is in order to protect charging safety; not only cut off the electric power of high voltage electric equipment; also cut off the electric power of low voltage equipment simultaneously; when charging, driver cannot carry out any operation to vehicle; also include to bring great inconvenience by the charged state of instrumental observation vehicle to normal use of vehicle.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of charging electric vehicle protection circuit, and this protection circuit ensure that charging security and do not affects the normal electricity consumption of vehicle in charging process.
nullFor solving above-mentioned technical problem，Charging electric vehicle protection circuit of the present utility model includes charger、Electrokinetic cell、Battery management unit、High voltage electric equipment、Accumulator、Low pressure distributor case and low voltage equipment，Tandem high pressure main relay between electrokinetic cell and high voltage electric equipment，It is connected between electrokinetic cell and the high voltage power supply output port of charger and has charging circuit，Serial connection charge relay on charging circuit，The coil of high pressure main relay and charge relay controls end and is all connected with battery management unit，Low voltage equipment is divided into the low voltage equipment needing continued power and the low voltage equipment being not required to continued power，It is structurally characterized in that needs the low voltage equipment of continued power to pass through low pressure continued power connection on one of them dividing potential drop relay of low pressure distributor case，Connect on the low-tension supply output port of charger and have the first relay and the second relay，The normally-closed contact of the first relay is connected on low pressure continued power circuit，The normally opened contact of the first relay is connected between low-tension supply output port and the low voltage equipment needing continued power of charger；The normally-closed contact of the second relay is connected in the coil power loop of high pressure main relay.
The low voltage equipment needing continued power includes instrument.
Described charger is charging pile or Vehicular charger.
Use said structure, entire car controller controls each point of electrical relay action in low pressure distributor case by car key on off state, to need the low-voltage equipment of the work when charging namely need the low voltage equipment of continued power to be placed on one of them point of electrical relay branch road, such as instrument, BMS etc. belong to need the low voltage equipment of continued power.
When vehicle is not charged, the coil of the first relay and the second relay all must not be electric, and each low voltage equipment is provided electric power, high voltage electric equipment to be provided electric power by electrokinetic cell by accumulator.
When vehicle connects charger under high pressure power-up state, the coil of the second relay obtains electric, its normally-closed contact is opened, the coil power loop making high pressure main relay disconnects, the normally opened contact of high pressure main relay returns to original state, the power supply of high voltage electric equipment is cut off, it is impossible to carry out travelling and other operation with high pressure, and now according to the communication message with charger, battery management unit decides whether that closing charge relay is charged.
When connecting charger under vehicle off-mode, low voltage equipment all can not work, now the first relay obtains electric, its normally opened contact closes, thus turn on the power path needed between the low voltage equipment of continued power and charger low-tension supply output port so that need the low voltage equipment of continued power directly to be provided low-voltage power by charger.The most now instrument has electricity, and operator can pass through instrumental observation charged state, also functions to the effect reminding driver vehicle charging simultaneously.
When vehicle be in charged state carry out high pressure power on time, owing to the normally-closed contact of the second relay is in open mode, the wire loop of high pressure main relay cannot obtain electric, the normally opened contact of high pressure main relay cannot close, therefore, high voltage electric equipment cannot obtain electric work, and vehicle cannot run.
Throw into question from the foregoing, this utility model thoroughly solves " start up the car in the case of being not turned off charging device, or being switched on power supply in the case of being not turned off high voltage component is charged " two kinds of situations, it is ensured that charging safety.Mainly can protect following several situation:
1) vehicle falls high pressure with regard to charge condition down, it is ensured that vehicle once inserts charging gun or charging inlet once connects and will automatically disconnect high voltage electric loop；
2) vehicle do not pull out charging wire harness just start vehicle condition, generally, the inside programming of battery management unit is prohibited from charging process high-tension electricity operation, but this utility model is limited from hardware circuit, more safe and reliable, ensureing to go up high pressure under charging inlet connection status, car load segment controller can not go up low tension simultaneously；
3) BMS occurs connecting and loosens or during signal fault, and BMS does not receives charging signals, but charging wire harness is connected with car load, and now automobile traveling can damage off-board charger, and protection circuit of the present utility model is possible to prevent this type of harm appearance.
Accompanying drawing explanation
With detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings:
Fig. 1 is this utility model circuit principle structure schematic diagram.
Detailed description of the invention
Referring to the drawings, charging electric vehicle protection circuit of the present utility model includes charger 1, electrokinetic cell 2, battery management unit BMS, high voltage electric equipment 3, accumulator 4, low pressure distributor case 5 and low voltage equipment.Charger 1 is charging pile or Vehicular charger, and its effect is that civil power or commercial power are converted into direct current, and it, in addition to having the high voltage power supply output port for charging, is usually constructed with low-tension supply output port.
Referring to the drawings, tandem high pressure main relay J1 between electrokinetic cell 2 and high voltage electric equipment 3, it is connected between electrokinetic cell 2 and the high voltage power supply output port of charger 1 and has charging circuit L1, serial connection charge relay J 2 on charging circuit L1, the coil of high pressure main relay J1 and charge relay J2 controls end and is all connected with battery management unit BMS, and low voltage equipment is divided into the low voltage equipment 6 needing continued power and the low voltage equipment 7 being not required to continued power.
Referring to the drawings, the low voltage equipment 6 needing continued power is connected in one of them dividing potential drop relay J 3 of low pressure distributor case 5 by low pressure continued power circuit L2, connect on the low-tension supply output port of charger 1 and have the first relay J 4 and the second relay J 5, the normally-closed contact of the first relay J 4 is connected on low pressure continued power circuit L2, and the normally opened contact of the first relay J 4 is connected between the low-tension supply output port of charger 1 and the low voltage equipment 6 needing continued power；The normally-closed contact of the second relay J 5 is connected in the coil power loop of high pressure main relay J1.
Wherein, the low voltage equipment 6 needing continued power can be configured as required, wherein, instrument and battery management unit BMS are adapted to need the low voltage equipment of continued power, for other low voltage equipments such as car light, sound equipment, power windows, according to the functional requirement in charging process, can be classified as needing the low voltage equipment 6 of continued power, it is possible to be classified as being not required to the low voltage equipment of continued power.
In conjunction with the circuit in accompanying drawing, below operation principle of the present utility model is described in detail.
Entire car controller controls the action of each point of electrical relay J3 in low pressure distributor case 5 by car key on off state, to need the low-voltage equipment of the work when charging namely need the low voltage equipment of continued power to be placed on the branch road of one of them point of electrical relay J3, such as instrument, BMS etc. belong to need the low voltage equipment of continued power.
When vehicle is not charged, the coil of the first relay J 4 and the second relay J 5 all must not be electric, and each low voltage equipment is provided electric power, high voltage electric equipment 3 to be provided electric power by electrokinetic cell 2 by accumulator 4.
When vehicle connects charger under high pressure power-up state, the coil of the second relay J 5 obtains electric, its normally-closed contact is opened, the coil power loop making high pressure main relay J1 disconnects, the normally opened contact of high pressure main relay J1 returns to original state, the power supply of high voltage electric equipment 3 is cut off, it is impossible to carry out travelling and other operation with high pressure, and now according to the communication message with charger 1, battery management unit BMS decides whether that closing charge relay J2 is charged.
When connecting charger under vehicle off-mode, low voltage equipment all can not work, now the first relay J 4 obtains electric, its normally opened contact closes, conducting needs the power path between the low voltage equipment 6 of continued power and charger 2 low-tension supply output port so that need the low voltage equipment 6 of continued power directly to be provided low-voltage power by charger 1.
When vehicle be in charged state carry out high pressure power on time, owing to the normally-closed contact of the second relay J 5 is in open mode, the wire loop of high pressure main relay J1 cannot obtain electric, the normally opened contact of high pressure main relay J1 cannot close, therefore, high voltage electric equipment cannot obtain electric work, and vehicle cannot run.
Summary; this utility model thoroughly solve " start up the car in the case of being not turned off charging device; or being switched on power supply in the case of being not turned off high voltage component is charged " two kinds of harm that situation causes, mainly can protect following several situation:
1) vehicle falls high pressure with regard to charge condition down, it is ensured that vehicle once inserts charging gun or charging inlet once connects and will automatically disconnect high voltage electric loop；
2) vehicle do not pull out charging wire harness just start vehicle condition, the inside programming of general battery management unit BMS is prohibited from charging process high-tension electricity operation, but this utility model is limited from hardware circuit, more safe and reliable, ensureing to go up high pressure under charging inlet connection status, car load segment controller can not go up low tension simultaneously；
3) BMS occurs connecting and loosens or during signal fault, and BMS does not receives charging signals, but charging wire harness is connected with car load, and now automobile traveling can damage off-board charger, and protection circuit of the present utility model is possible to prevent this type of harm appearance.
In sum, this utility model is not limited to above-mentioned detailed description of the invention.Those skilled in the art, on the premise of without departing from spirit and scope of the present utility model, can do some changes and modification.Protection domain of the present utility model should be as the criterion with claim of the present utility model.
Claims (3)
- null1. a charging electric vehicle protection circuit，Including charger (1)、Electrokinetic cell (2)、Battery management unit (BMS)、High voltage electric equipment (3)、Accumulator (4)、Low pressure distributor case (5) and low voltage equipment，Tandem high pressure main relay (J1) between electrokinetic cell (2) and high voltage electric equipment (3)，It is connected between electrokinetic cell (2) and the high voltage power supply output port of charger (1) and has charging circuit (L1)，The upper serial connection charge relay (J2) of charging circuit (L1)，The coil of high pressure main relay (J1) and charge relay (J2) controls end and is all connected with battery management unit (BMS)，Low voltage equipment is divided into be needed the low voltage equipment of continued power (6) and is not required to the low voltage equipment (7) of continued power，It is characterized in that the low voltage equipment (6) needing continued power is connected on one of them dividing potential drop relay (J3) of low pressure distributor case (5) by low pressure continued power circuit (L2)，Connect on the low-tension supply output port of charger (1) and have the first relay (J4) and the second relay (J5)，The normally-closed contact of the first relay (J4) is connected in low pressure continued power circuit (L2)，The normally opened contact of the first relay (J4) is connected between the low-tension supply output port of charger (1) and the low voltage equipment (6) needing continued power；The normally-closed contact of the second relay (J5) is connected in the coil power loop of high pressure main relay (J1).
- 2. charging electric vehicle protection circuit as claimed in claim 1, is characterized in that the low voltage equipment (6) needing continued power includes instrument.
- 3. charging electric vehicle protection circuit as claimed in claim 1 or 2, is characterized in that described charger (1) is charging pile or Vehicular charger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620316142.3U CN205632134U (en) | 2016-04-16 | 2016-04-16 | Electric automobile charge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620316142.3U CN205632134U (en) | 2016-04-16 | 2016-04-16 | Electric automobile charge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205632134U true CN205632134U (en) | 2016-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620316142.3U Active CN205632134U (en) | 2016-04-16 | 2016-04-16 | Electric automobile charge protection circuit |
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| CN (1) | CN205632134U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111516513A (en) * | 2019-02-05 | 2020-08-11 | 株式会社斯巴鲁 | Vehicle with a steering wheel |
| CN112848940A (en) * | 2019-11-12 | 2021-05-28 | 上海汽车集团股份有限公司 | Communication wiring harness, vehicle-mounted charging equipment and vehicle |
-
2016
- 2016-04-16 CN CN201620316142.3U patent/CN205632134U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111516513A (en) * | 2019-02-05 | 2020-08-11 | 株式会社斯巴鲁 | Vehicle with a steering wheel |
| CN112848940A (en) * | 2019-11-12 | 2021-05-28 | 上海汽车集团股份有限公司 | Communication wiring harness, vehicle-mounted charging equipment and vehicle |
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